[AusNOG] ASR 903 Shaping

[Jacob Bisby]

I can confirm that they are definitely not lying about ‘degraded performance’ when you get your shaper config “wrong”.

That being said, I’m not sure what actual impact it will have on such a low-bandwidth circuit either.

- Jacob Bisby

 

From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of David Fowler
Sent: Thursday, 24 May 2018 3:33 PM
To: Brad Henshaw <henbra at gmail.com>
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] ASR 903 Shaping

 

Hi Brad

 

I think we do. Telstra pretty explicit saying this is required else “you’ll experience degraded performance”. Their 4Mb EA spec wants a 32000 bit BC when the shaper can only be configured with a minimum 60000.

 

 

Regards,

 

David Fowler

Infrastructure Engineer – Enterprise Operations

 

From: Brad Henshaw <henbra at gmail.com <mailto:henbra at gmail.com> >
Date: Thursday, 24 May 2018 at 15:07
To: David Fowler <David.Fowler at datacom.com.au <mailto:David.Fowler at datacom.com.au> >
Cc: "ausnog at lists.ausnog.net <mailto:ausnog at lists.ausnog.net> " <ausnog at lists.ausnog.net <mailto:ausnog at lists.ausnog.net> >
Subject: Re: [AusNOG] ASR 903 Shaping

 

Hi David, 

 

It may be worth reviewing whether you really need to specify Bc in your shaper policy. It was a while ago but I recall when working with the ASR920 I found the burst values automatically calculated by IOS (without manually specifying Bc/Be) worked pretty effectively when using 'shape average' in multi-level policies. I haven't touched a 903 however so don't know if its behaviour is different.

 

Regards,

Brad

 

 

On Thu, May 24, 2018 at 3:37 PM, David Fowler <David.Fowler at datacom.com.au <mailto:David.Fowler at datacom.com.au> > wrote:

Hi folks

 

Does anyone know if it’s possible to enter in a lower BC value in a Shaping policy? Seems with this platform the lowest is 60000 bits… this doesn’t help when we need to configure 4Mbps Telstra EA policies…

 

Maybe a different software version?

 

Regards,

 

David Fowler

Infrastructure Engineer – Enterprise Operations

 

 

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